Be Baby-Ready (When You're Ready)

Weigh In

Having a body-mass index greater than 25 can increase the likelihood of a lot of health troubles, including polycystic ovary syndrome, which disrupts your menstrual cycle—and any future plans for parenthood. Aim for a BMI between 18.5 and 25; calculate yours now. —Katherine Bowers

Butt Out

You know smoking stinks for your health—and now studies show that it can raise your risk for early menopause. Toxins in cancer sticks may disrupt ovulation. Quitting today can preserve your fertility; visit SmokeFree.gov.

B Smart

Once recommended for pregnant women, folic acid (400 micrograms a day) is now considered good medicine for all women of childbearing age, says Mark Gapinski, M.D., an ob/gyn at Central DuPage Hospital in Winfield, Illinois. Found naturally in lentils (360 mcg per cup) and leafy greens like spinach (260 mcg per cup), the B vitamin prevents miscarriage and birth defects.

Hit the Hay

Some infertile women have been shown to have low levels of leptin, a hormone that affects hunger and weight regulation. Leptin levels drop if you fall short on zzz's, so try to log seven to eight hours tonight!